Implement first-round sorting in memory adapter

lib/adapters/memory.js

@@ -45,9 +45,46 @@ Memory.prototype.all = function all(model, filter, callback) {
     var nodes = Object.keys(this.cache[model]).map(function (key) {
         return this.cache[model][key];
     }.bind(this));
-    process.nextTick(function () {
-        callback(null, filter && nodes ? nodes.filter(applyFilter(filter)) : nodes);
+
+    if (filter) {
+
+        // do we need some filtration?
+        if (filter.where) {
+            nodes = nodes ? nodes.filter(applyFilter(filter)) : nodes;
+        }
+
+        // do we need some sorting?
+        if (filter.order) {
+            var props = this._models[model].properties;
+            var allNumeric = true;
+            var orders = filter.order;
+            if (typeof filter.order === "string") {
+                orders = [filter.order];
+            }
+            orders.forEach(function (key) {
+                if (props[key].type.name !== 'Number' && props[key].type.name !== 'Date') {
+                    allNumeric = false;
+                }
             });
+            if (allNumeric) {
+                nodes = nodes.sort(numerically.bind(orders));
+            } else {
+                nodes = nodes.sort(literally.bind(orders));
+            }
+        }
+    }
+
+    process.nextTick(function () {
+        callback(null, nodes);
+    });
+
+    function numerically(a, b) {
+        return a[this[0]] - b[this[0]];
+    }
+
+    function literally(a, b) {
+        return a[this[0]] > b[this[0]];
+    }
 };
 
 function applyFilter(filter) {